Add new encryption scheme in server part.

server/conf.php

@@ -80,4 +80,11 @@ $REQUESTS_MIN_DELAY=1000;
   Clear master keys and reset passwords after 15 minutes of inactivity
  */
 $CLEAR_TIME=15*60*1000;
+
+/*
+  The first crypto schema use an AES-ECB process to encrypt logins.
+  It's used until version 0.7.
+  Since version 0.8, we use AES-CBC + SHA256.
+ */
+$CRYPTO_V1_COMPATIBLE=1;
 ?>